Improvement in coffee-mills



D. W. PARKER.

COFFEE MILL.

Patented Feb. 27, 1877.

UNITED STATES PATENT OFFICE,

DEXTER W. PARKER, OF MERIDEN, CONNECTICUT, ASSIGNOR TO CHARLES PARKER, OF SAME PLACE.

IMPRQVEMENT IN CQFFEE-MILLS.

Speciiication forming part of Letters Patent No. 187,898, dated February 27, 1577; application tiled November 22, 1876.

To all whom it may concern.'

Be it known that I, DEXTER W. PARKER, of Meriden, in the county of New Haven and State of Connecticut, have invented a new Improvement in Coffee-Mills; and I do hereby declare the following, when taken in connection with the accompanying drawings and the letters ot' reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specication, and represent a vertical centrai section.

This invention relates to an improvement in that class of grinding-mills commonly known as box or hand mills,77 and in which the runners are mounted on a vertical spindle provided with a crank for turning in a horizontal plane, and specially to that class in which two runners are employed with the different shells, then upper as a cracker and the lower as a grinder.

In this class of mills the runners have usually been formed upon independent spindles,

through a bearing above, and on which the said spindle is made adjustable vertically, to

.raise or lower the runners, as the case may A represents the box, which is of the usual construction; B, the lower or grinding shell; C, the upper or cracker shell, secured together and to the top of the box in the usualman- 11er. D is the lower or grinding runner, formed upon, or preferably cast as a part of, the vertical spindle E. F is the upper or cracker runner, which is litted to the spindle E, and relatively located to the grinding-runner by a shoulder, a, so that a single spindle serves for both the cracking and grinding runners. This spindle passes up vertically through the support or bearing G, and to its upper end the crank H is attached, in the usual manner. Around the upper end of the spindle, and resting on the bearing G, is a sleeve, L, from which projects an arm, P, and through the crank an adjusting-screw, S, passes, its lower end resting upon the arm P. By turning this screw in one direction or the other the crank is raised or lowered relatively to the upper end of the sleeve L, and accordingly raises or lowers both the runners.

The usual hopper T is provided, through which the material to be ground passes, first to the cracker, and then to the runner, in the usual manner.

Byv this construction the usual adjustingbridge beneath is avoided, and a more convenient central adjustment made available.

I claiml. In a double-runner grinding-mill, the lower or grinding runner formed solid upon the spindle, which extends through the cracker-runner, the said cracker-runner secured to the spindle in its proper relative position t0 the grinder, substantially as specilied.

2. In a double-runner grinding-mill, the lower or grinding runner formed solid upon the spindle, which extends through the cracker-runner, the said cracker-runner secured to the spindle in its proper relative position to the grinder, combined with a crank upon the upper end of the spindle, and an adjustingscrew for adjusting the elevation of the spindie, substantially as specified.

DEXTER W. PARKER. Witnesses:

GEO. C. MEERIAM, RALPH A. PALMER. 

